【作者】 江丽琼； 贾敏； 郭庆； 顾学迈； 张乃通；

【Author】 Liqiong Jiang;Min Jia;Qing Guo;Xuemai Gu;Naitong Zhang;Communication Research Center Harbin Institute of Technology;

【机构】 哈尔滨工业大学通信研究所；

【摘要】 随着卫星通信技术的迅猛发展,将地面第三代合作伙伴计划(3GPP,3^rdGeneration Partnership Project)长期演进（LTE,Long Term Evolution）引入到卫星通信系统中,构建基于LTE的新一代卫星移动通信系统成为主流趋势。由于卫星通信系统具有长往返时延、大覆盖范围、卫星信道慢衰落等特点,将其与地面通信系统结合时不能照搬地面无线接口空中标准,本文将LTE空中接口加以改进应用于卫星通信网络,在分析LTE上行链路共享信道（PUSCH）结构的大尺寸传输块（RB）基础上,考虑卫星系统功率受限的特点,给出一种窄带上行链路传输方案。理论分析和仿真结果表明,采用窄带上行传输方式,有效地提高了系统总吞吐量和卫星波束频谱利用率。更多还原

【Abstract】 With the rapid growth of satellite mobile communication technology,the development tendency of satellite mobile communication is bringing in 3^rd Generation Partnership Project（3 GPP）Long Term Evolution（LTE） and building a LTE mobile satellite communication system.It is unpractical to apply the LTE technology to the satellite system directly because of the problems of the long round-trip delay,large cell size and power-limited system in geostationary satellite mobile communication network.Some improvements in radio interface which adapts the 3GPP LTE technology for satellite system are proposed.This paper presents a narrowband uplink transmission scheme,which is based on the analysis of the large transmission block（RB） in PUSCH of LTE.Theory analysis and simulation results show that the total system throughput and the beam spectral efficiency are both improved effectively by adopting the narrowband uplink transmission scheme reasonably.更多还原